Photoluminescence of a silver-doped glass

Photoluminescence of silver in glassy matrices

“…Silver diffusion from the coatings on soda-lime glass substrates is favored by the ion exchange process, which also occurs at low temperatures, between Ag + in the coating and Na + in the substrate, with the subsequent interdiffusion of the two species in order to maintain the electrical neutrality of the glass. 4,5,8 This result is consistent with the PL spectra, which exhibit the emission band characteristic of the presence of Ag + . With silica substrates, the silver concentration gradient may be the main driving force for silver diffusion from the coating to the substrate.…”

“…[1][2][3][4][5][6][7][8][9][10] For instance, the incorporation of isolated metal ions (mainly Ag + and Cu + ) in glass gives rise to an intense photoluminescence (PL) emission, which is potentially useful for optoelectronic applications, and a concurrent change in the refraction index with the consequent formation of light waveguides. [11][12][13][14][15][16][17][18][19][20] On the other hand, the metal ions may be reduced, causing them to aggregate and form metal nanoparticles that exhibit other interesting optical properties such as high nonlinear susceptibility, optical absorption ascribed to plasmon resonances, and so on.…”

White light emission from γ-irradiated Ag/Eu co-doped phosphate glass under NUV light excitation

“…4(a). Silver aggregates are responsible for these decay components [29,45]. The obtained effective lifetimes (1/e of initial intensity) are ≈ 1170 s, and ≈ 665 s for ␥-irradiated Ag/Eu co-doped and Ag singly doped phosphate glasses, respectively.…”

“…The changes of cut-off wavelengths for various glasses are due to the increase of the nonbridging oxygen ions and UV absorption of Ag + and Eu 3+ . For Ag singly doped glass, the absorption band centered at about 227 nm is due to the parity-forbidden transition d 10 ( 1 S 0 ) → d 9 s 1 ( 3 D 1 ) of Ag + [29]. For Eu doped glasses, the charge-transfer absorption bands peaked at about 250 nm and sharp absorption peaks at 393 and 464 nm are assigned to Eu 3+ [30].…”

Optical Characterization of Ag Nanoparticles Embedded in Aluminophosphate Glass

“…In such scenario, we also report on PL measurements, including temperature dependence studies, which were performed in order to characterize the material before and after thermal processing. The PL investigations performed on similar glasses doped with silver [15][16][17][18][19] are referred to where appropriate, because these also shed light into our spectroscopic characterization.…”